Thermostatic valve for heating systems



.Dec. 19, 1922.

. J. P. COUSINS.-

THERMOSTATIC VALVE FOR HEATING SYSTEMS.

2 SHEETS-SHEEI FILED MAR. 10. I92!- Dec. 19, 192 2.

1. P. cousms.

" THERMOSTATIC'VALViE FOR HEATING SYSTEMS.

mu) MAR. I0. 1921.

' 2 ISHEETS-SHEET 2.

3mm; Jokn/ P. Cousins v Patented Der. i9, 192% has reacts JOHN P. COUSINS, 01F PORTSYMOUTH, VIRGINIA, .ASSZGNQR, BY DIRECT AND MESNE ASSIGNMENTS, TO GOLF?) CAR HEATEIIIG 6?, LIGHTING QUEER/ANY, 9E NEXV YORK, N. Y.,

A COBIOlI-MSLTIOLN OF NEVJ YORK.

THEREIOSTATIG VALVE FOE HEATING SYSTEIKS.

Application filed March 10, 1921.

To all whom it may concern Be it known that l JOHN P. t ous'ivs citizen of the United States. residing at Portsmouth, in the county ot Norfolk and State of Virginia, have invented certain new and useful Improvements in Thermostatic Valves for Heating Systems of which the following is a specification.

This invention relates to'an innproved thermostatic valve for heating systems adapted for use in connection with car heating systems wherein the flow of steam through the valve to a radiator is controlled by a thermostat thermally affected by exhaust steam discharging through the valve, although not limited in its application to th particular service mentioned. v

A prevalent type of valve ot the character indicated has heretofore been constructed with an inlet chamber, anexhaust chamber, and an intermediate chamber in which latter chamber is located a spring normally hold.- ing the valve open, said'spring being: associated with the valve stem which extends from the intermediate chamber through a dividing wall into the inlet chamber. In such a construction. it has been found in practice that steam and water of condensation work through around the valve stem from the inlet chamber to the intermediate chamber to not only cause corrosion of the spring but to also cause the spring to lose its temper with a resultant faulty operation ot the valve. l urthcrmore. in thus mountinc" the spring within the intermediate chamher, the spring is very' inaccessible. The present invention has, therefore, among other objects, to overcome these varous difficulties and to provide a valve which. while being free from the objectionable features noted, will also be simplified in construction and facilitate the renewal of the spring Without disturbing the packing surrounding the valve stem.

In the drawings:

Figure 1 is a sectional view taken medially through a valve embodying the present invention,

Figure2 is a verticalsectional view taken through the exhaust chamber of the valve, and i Serial No. 451,100.

Figure 3 is a perspective view showing the valve stemv and associated parts in detail.

.Reterrinc; now more particularly to the drawings l have illustrated a thermostatic valve of a type quite prevalently used in connection with car heating systems. This valve comprises a casing which is formed with a steam inlet chamber 10 1111 exhaust chamber 11, and an intermediatechan'iber l2 separated from the chamber 10 by a dividing wall 13. Within the chamber 10 is mounted the usual strainer 14 associated with an appropriate bushing providing avalve seat 15. Leading into said chamber is an inlet pipe 16 while a continuation 17 of saidpipe leads from the chamber to a suitable radiator. Connecting the radiator mentioned with the exhaust chamber 11 is a return pipe 18 :tor V let or horn 19, the exhaust chamber being closed at its upper end by a removable cover plate 20. Slidable through the partition wall 13 axially of the chan'lber 12 is a valve stem 21 upon the inner end of which is mounted a valve 22 adapted to coo ierate with the seat 15. Mounted upon the outer end of said stem is a thermostat arranged to cooperate with an abutu'ient 24 for opening and closing the valve 22, the thermostat being thermally altected by the spent steam flowing throu {1h the exhaust chan iber.

(lominpj now moreparticularl to the ,lllk jcct of the present invention. one of the side plates of the thermostat 23 is. as particularly shown in Figures 1 and 3, provided, with a socket 25 which removably receives the outer end 0'1? the stem 21 and extending through the wall of the socket andthrou rh said stem is a cotter 26 locking the plate upon the stem, this construction providing an arrangement whereby the stern may be readily detached. The outer end portion of the chamber 12is enlarged and threaded therein is a tubular bushin or gland plug 27 providedat its outer end with a head" to co act with the "wallet the chamber all. This plug is formed internally a point between its ends with a partition wall slidably re ceiving the stem 21 therethrimgh for guilling and supporting the stem and extending into the plug to hear at one end against said wall is the usual spring 29 coacting at its oppo;v to end with the socket 25 for normally holding the valve 22 open. This socket, therefore, serves the function of a shoulder for sustaining the thrust of the spring and eliminates the necessity for forming the stem 21 itself with a shoulder. In thus making provision whereby a smooth stem may be employed, the cost of production is, as compared with an arrangement wherein the stem is so formed with a shoulder, materially reduced. Arranged within the inner end portion of the plug at the side of the partition wall 28 opposite the spring 29 is a suitable packing; 30 and threaded into the plug at its inner end to surround the stem 21 is a gland nut 31 compressing the packing to provide-a tight joint between the stem and the plug.

'I'hus, live steam or water of condensation working through the dividing wall 13 around the stem 21 from the inlet chamber 10 into the intermediate chamber 12, will be prevented from flowing along the stem to come in contact with the spring 29, the spring not only being mounted at the side of the dividing wall 13 opposite the inlet chamber but also being protected by the packing gland ofthe plug 2? Corrosion oi the spring or overheating thereof to cause the spring to lose its temper, will accordingly be effectually preventei'l. Furthermore, since the spring is carried by the stem 'within the exhaust chamber 11, which chamber open to the atmosphere through the pipe 19, the spring will be subjected. to the cooling influence oi? the atmosphere to thus further guard against overheating pf the spring.

Attention is now directed to the fact that by employing the tubular plug 27, the sprin 29 is accommodated without the necei ,ty for widening the cxhaustcl amber ll, it being appreciated, of course, that said spring must be of a given length to permit proper travel otthe valve 2-2. Furthermore, by e1nploying a tubular plug of the character shown, provision is made for the packing glai'ld without the necessity for forming); the casing to accommodate the gland. Access to the spring may be had by simply removing the plate 90 when, by displacing the pin 26, the thern'iostat may be detached from the valve stem. The spring may then, of course, be drawn forwardly from around the valve stem and removed. while. should it be found desirable to renew the packing 50. the plug 27 may then be displaced, the nut 31, of course, reniiaining stationary upon the plug. .lt-will thus be seen that. when desired. the spring 29 may be readily renewed and the vaglve easily maintained in proper working or er.

lilaving thus described the invention, what is claimed as new is:

l. A thermostatic valve comprising, in combination, a valve casing: having a thermostat chamber, a valve stem extending into said chaniber,'a thermo-motive element .removably mounted in said hainher and devalve stem termmating well within said rccess in a restricted portion forming: a guide .i'or said valve stein, means comprising a spring restraining abutment carried by said valve stem at the end connected with said thermo-motiveelement, and a spring sur rounding the end of said valve stem exposed in said chamber, said sprin beii conf ned between said abutment and the rest icted portion of said bushing.

5 A thermostatic valve, as dei'ined by l 'n 1,

in which the restricted portion of bushing: comprise a 'g land, a packing in said gland, and a gland nut, whereby ring may be compressed into sealing ation wit said valve stem. 7 e. d. thermost: 'ic valve. as defined by claim 1, in which the restricted PUl'LlUll o'l said bushing; comprises a packing ringgland openingfrom the inserted end of said bushing, a ring of packing in said' and, and a gland nut closingthe open end of said g lanr. I 4

-l. A thermostatic valve as defined by claim 1, in Which said bushinnfis inthreaded engagement with the recessed portion of said casing and is provided its cxposed end with a head oi increaseddiameter to facilitate its removal the underside of said head also forming a limiting stop.

A. thern'icstatic valve as defined by claim l in which the restricted portion 01? said bushingcoin prises a gland, a packing posed end, a head ol increased diaoleter to facilitate its removal, the underside of said head. also toriniirg a limiting stop.

In testimony whereof I afiix my signature.

JOHN P, cousins; [n 5. 

